FC-051 Danfoss
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The Danfoss FC-051 is part of the VLT FC 51 Micro Drives series and features an enclosure rating of IP20. It offers 2 analog inputs, 5 digital inputs, and supports a maximum ambient temperature of 40 °C. This micro drive has an overload capacity of 150% for 1 minute and includes an RS-485 serial interface.
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Product Description:
The FC-051 is a compact AC variable frequency drive produced by Danfoss for the VLT FC 51 Micro Drives series. It is used to control fan, pump, and conveyor motors in general automation applications. The drive converts fixed mains voltage into a modulated output that allows precise regulation of motor speed and torque while conserving panel space. By integrating the control electronics, power stage, and keypad in one ventilated housing, the unit can be mounted directly on a DIN rail inside machine panels where wiring distances must remain short.
An enclosure rating of IP20 allows finger-safe installation inside a protected cabinet, while ventilation openings provide natural convection cooling. The integrated 24 V auxiliary supply can provide up to 200 mA for external sensors or indicator relays. Control flexibility comes from two analog inputs that accept process signals and five digital inputs rated for up to 28 V DC. The analog output stage can send speed feedback or torque demand to a PLC when the connected load does not exceed 500 Ω. Its 8-bit resolution supports coarse signal trending and operating-status confirmation. A relay rated for 250 V AC and 2 A provides status signaling to connected control equipment.
The micro drive operates without derating at ambient temperatures up to 40 °C and at elevations up to 1,000 m. Between 1,000 m and 3,000 m, the output current must be reduced to account for decreased cooling capacity. A 150% overload for one minute supports motor acceleration and jam-release sequences. Unshielded motor cable can run up to 50 m, while shielded cable runs are limited to 15 m to control electromagnetic emissions. A multidrop serial bus based on RS-485 enables remote parameter adjustment and diagnostic communication with compatible human-machine interfaces. The drive also tolerates vibration levels up to 1.0 g under applicable IEC test conditions, supporting operation in industrial control cabinets exposed to normal machine vibration.
Frequently Asked Questions about FC-051:
Q: How many analog inputs does the Danfoss FC-051 micro drive provide?
A: The FC-051 supports up to 2 analog inputs for control and monitoring purposes.
Q: What is the overload handling capability of the FC-051?
A: This micro drive offers an overload capacity of 150% for up to 1 minute.
Q: What is the enclosure rating of the Danfoss FC-051 micro drive?
A: The FC-051 micro drive features an IP20 enclosure rating, making it suited for indoor environments where direct contact with water is not expected.
Q: What is the maximum shielded motor cable length supported by the FC-051?
A: The maximum permissible length for shielded motor cables on the FC-051 is 15 meters.
Q: What is the relay contact rating for the FC-051?
A: The micro drive includes a relay contact rated for 250 V AC at 2 A.
